package com.lovezy.platform.core.valid.validators;


import com.lovezy.platform.core.exception.ValidationException;
import com.lovezy.platform.core.valid.Validator;
import com.lovezy.platform.core.valid.annotation.CardId;

import java.lang.annotation.Annotation;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Map;

/**
 * 
 * 身份证校验器
 *
 */
public class CardIdValidator implements Validator {
	private final int[] PARITYBIT = { '1', '0', 'X', '9', '8', '7', '6', '5',
			'4', '3', '2' };
	private final int[] POWER_LIST = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10,
			5, 8, 4, 2 };
	private final Map<Integer, String> zoneNum = new HashMap<Integer, String>();

	public void validate(Object value, Annotation annotation)
			throws ValidationException {
		CardId an = (CardId) annotation;
		if (!isIdCard(value.toString())) {
			throw new ValidationException(an.errorCode(), an.errorMsg());
		}
	}

	public CardIdValidator() {
		zoneNum.put(11, "北京");
		zoneNum.put(12, "天津");
		zoneNum.put(13, "河北");
		zoneNum.put(14, "山西");
		zoneNum.put(15, "内蒙古");
		zoneNum.put(21, "辽宁");
		zoneNum.put(22, "吉林");
		zoneNum.put(23, "黑龙江");
		zoneNum.put(31, "上海");
		zoneNum.put(32, "江苏");
		zoneNum.put(33, "浙江");
		zoneNum.put(34, "安徽");
		zoneNum.put(35, "福建");
		zoneNum.put(36, "江西");
		zoneNum.put(37, "山东");
		zoneNum.put(41, "河南");
		zoneNum.put(42, "湖北");
		zoneNum.put(43, "湖南");
		zoneNum.put(44, "广东");
		zoneNum.put(45, "广西");
		zoneNum.put(46, "海南");
		zoneNum.put(50, "重庆");
		zoneNum.put(51, "四川");
		zoneNum.put(52, "贵州");
		zoneNum.put(53, "云南");
		zoneNum.put(54, "西藏");
		zoneNum.put(61, "陕西");
		zoneNum.put(62, "甘肃");
		zoneNum.put(63, "青海");
		zoneNum.put(64, "宁夏");
		zoneNum.put(65, "新疆");
		zoneNum.put(71, "台湾");
		zoneNum.put(81, "香港");
		zoneNum.put(82, "澳门");
		zoneNum.put(91, "国外");
	}

	/**
	 * 身份证号是否基本有效
	 * 
	 * @param s
	 *            号码内容
	 * @return 是否有效，null和""都是false
	 */
	private boolean isIdCard(String s) {
		if (s == null || (s.length() != 15 && s.length() != 18))
			return false;
		final char[] cs = s.toUpperCase().toCharArray();
		// （1）校验位数
		int power = 0;
		for (int i = 0; i < cs.length; i++) {// 循环比正则表达式更快
			if (i == cs.length - 1 && cs[i] == 'X')
				break;// 最后一位可以是X或者x
			if (cs[i] < '0' || cs[i] > '9')
				return false;
			if (i < cs.length - 1)
				power += (cs[i] - '0') * POWER_LIST[i];
		}
		// （2）校验区位码
		if (!zoneNum.containsKey(Integer.valueOf(s.substring(0, 2)))) {
			return false;
		}
		// （3）校验年份
		String year = s.length() == 15 ? "19" + s.substring(6, 8) : s
				.substring(6, 10);
		final int iyear = Integer.parseInt(year);
		if (iyear < 1900 || iyear > Calendar.getInstance().get(Calendar.YEAR)) {
			return false;// 1900年的PASS，超过今年的PASS
		}
		// （4）校验月份
		String month = s.length() == 15 ? s.substring(8, 10) : s.substring(10,
				12);
		final int imonth = Integer.parseInt(month);
		if (imonth < 1 || imonth > 12)
			return false;
		// （5）校验天数
		String day = s.length() == 15 ? s.substring(10, 12) : s.substring(12,
				14);
		final int iday = Integer.parseInt(day);
		if (iday < 1 || iday > 31)
			return false;
		// （6）校验一个合法的年月日
		if (!validate(iyear, imonth, iday))
			return false;
		// （7）校验“校验码”
		if (s.length() == 15)
			return true;
		return cs[cs.length - 1] == PARITYBIT[power % 11];
	}

	private boolean validate(int year, int month, int day) {
		// 比如考虑闰月，大小月等
		return true;
	}
}